In
[1]}, the methods of [2]} were applied to study the Dirichlet problem for a class of divergence form operators satisfying (REF ).
There is a constant associated with the
“size" of this Carleson measure, referred to as the Carleson norm. See section 2 for the definition of Carleson measure, and its norm.
This Carleson condition on the coefficients of the matrix implies that \(|\nabla a_{i,j}(X)|\)  is bounded away from the boundary, but could blow up near the boundary.
